I don’t really understand these questions so it would be much appreciated if anyone can answer these for me!! 1. Find an expression which represents the difference when (8z + y) is subtracted
from (-5x – 8y) in simplest terms.

2. Write an equivalent expression by distributing the “-“ sign outside the parentheses:
-(-8.6q-3r – 4)

3. Write an equivalent expression by distributing the “-“ sign outside the parentheses:
-1.6y - (4z - 2.4)

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Abag of jelly beans contain 13 pink, green, 20 yellow, 10 black, 7 red, and 11 orange jelly beans. approximately what percent of the jelly beans are pink and yellow?

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.